ML20248F905

Summary of 980519 Meeting W/Westinghouse in Rockville,Md Re Retran & Vipre Computer Codes Applications.List of Attendees & Handouts Encl

ML20248F905
Person / Time
Issue date:	06/01/1998
From:	Wen P NRC (Affiliation Not Assigned)
To:	Essig T NRC (Affiliation Not Assigned)
References
NUDOCS 9806050033
Download: ML20248F905 (46)

Text

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.- 1 push y p k UNITED STATES

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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30seH001

\ *.*s / Ome 01,1998 MEMORANDUM TO: Thomas H. Essig Acting Chief Generic issues and Environmental Projects Branch Division of Reactor Program Management Office of Nuclear Reactor Regulation FROM: Peter C. Wen, Project Manager vOI Generic lasues and Environmental Projects Branch Division of Reactor Program Management Office of Nuclear Reactor Regulation

SUMMARY

OF MAY 19,1998, MEETING WITH WESTINGHOUSE REGARDING RETRAN AND V! PRE COMPUTER CODES' L APPLICATIONS On May 19,1998, a public meeting was held at the U.S. Nuclear Regulatory Commission's (NRC's) offices in Rockville, Maryland, between representatives of the NRC, Westinghouse, and other interested parties. Attachment i lists attendees at the meeting, and Attachment 2 contains a copy of the material that was handed out at the meeting.

The purpose of the meeting was to help facilitate the NRC staff's review and approval of both the

! RETRAN-02 and the VIPRE-01 topicals. Both topicals were submitted for staff review in June 1997 and April 1997, respectively. Because of the need to support utility licensing submittals (Farley and South Texas Projects), Westinghouse requested expedited staff review of both codes by the end of the year.

l The Westinghouse representative presented summary descriptions of the use of both computer L codes, which were developed by the EPRI and approved generically by the NRC staff. The staff reiterated that individual applications should meet certain requirements and conditions listed in the previous topical report evaluations. This was agreed by Westinghouse representative to provide a complete description of how the prior RETRAN topical report safety evaluation l

requirements were satisfied. The Westinghouse representative also stated that (1) its code users have been properly trained, (2) the comparison calculations have been performed against both other approved codes and plant test data and have shown extensive agreement, and (3) the Westinghouse software quality assurance program has been implemented.

Westinghouse plans to use the RETRAN-02 to replace its current use of the NRC-approved LOFTRAN code for reactor system transient analysis and to use the VIPRE-01 to replace the THINC and FACTRAN codes that are used for reactor core DNBR analysis. It was explained by the Westinghouse representative and the utilities representative that the target date for review of the RETRAN-02 topical of December 1998 was very important to them. The Westinghouse representative also requested a timely review of the VIPRE-01 topicalin 1998 because of the }

complementary nature of the RETRAN and VIPRE computer codes. The staff stated that there i are currently no funds budgeted for contractor support; thus, the submitted topical reports on 3 PDR

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TOPRP Dw 980112 y g _.g g % N NBC MFBETE COPY i

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T. Essig 2-both codes would have to be performed in-house on a schedule consistent wiip' the staff's workload. The staff also stated that it expects to send out formal question lists (requests for additional information) for both codes in the near future. The staff will discuss Westinghouse's proposed schedule with NRC management.

Attachments: As stated cc w/atts: See next page i

/ [/tVRA$u $ g DISTRIBUTION: See attached page Document Name: G:\PWX\MSU_ cs vM0519. . o, g / , k g et W ppm (r . 3h OFFICE PM:PGEB SCpSgtXh SC:PGEk[D NAME PWen:sw thd Rh FAkstuYicz DATE 5/7//98 5/N/98 f/l//

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Distribution: Mtg. Summary w/ Westinghouse Re RETRAN and VIPRE Computer Codes Dated _.

l Hard_ Copy l < Docket File PUBLIC  !

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OGC ACRS PWen EMail SCollins/FMiraglia BSheron RZimmerman BBoger JRoe DMatthews TEssig FAkstulewicz GHolahan TCollins RCaruso WJensen FOrr TAlexion JZimmerman GTracey, EDO i

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l Mr. Nicholas Liparulo, Manager Regulatory and Engineering Networks Westinghouse Electric Corporation Mail Stop ECE 4-15 P.O. Box 355 Pittsburgh, PA 15230-0355 L Mr. Hank Sepp Westinghouse Electric Corporation PO Box 355 Pittsburgh, PA 15230-0355 l

Mr. Andrew Drake, Project Manager Westinghouse Owners Group Westinghouse Electric Corporation Mail Stop ECE 5-16 P.O. Box 355 Pittsburgh, PA 15230-0355 Mr. Sumit Ray i

Westinghouse Electric Corporation PO Box 355 Pittsburgh, PA 15230-0355 ,

i Jack Bastin, Director l Westinghouse Electric Corporation 11921 Rockville Pike, Suite 107 j

Rockville, MD 20852 l

i 1

L - - - - - - - - - - - - - _ - . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ o

. i NRC/ WESTINGHOUSE MEETING ON RETRAN AND VIPRE COMPUTER CODES LIST OF ATTENDEES May 19,1998 NAME ORGANIZATION Ralph Caruso NRR/DSSA/SRXB Walt Jensen NRR/DSSA/SRXB Frank Orr NRR/DSSA/SRXB Peter Wen NRR/DRPM/PGEB Tom Alexion NRR/DRPW/PDIV-1 Charles Albury South Texas Project Mark Ajiuri SNC Jim Sechrisf Westinghouse David Huegel Westinghouse Yixing Sung Westinghouse Steve Love Westinghouse Hank Sepp Westinghouse Sumit Ray Westinghouse Janelle Ivey Westinghouse Jack Bastin Westinghouse I

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Westinghouse Proprietary Class 3 .

Westinghouse VIPRE-01

1. Application Meeting with NRC on RETRANNIPRE Yixing Sung Westinghouse Electric Company May 19,1998 1

Outline

+ VIPRE-01 Integration

+ Compliance to VIPRE-01 SER

+ Topical Report WCAP-14565 l + Code /Model Qualification

+ Summary 2

w ,,u,,,w s,a w a,,y a..,3 urrent VIPREIntegration

+_C + Combines VIPRE with NRC-approved methodology

+ DNB correlations

+ One-pass core modeling

+ Mixed core evaluation

+ Non-LOCA hot rod analysis

+ Equivalent to NRC-approved codes

+ THINC (WCAP-12330-A)

+ FACTRAN (WCAP-7908-A) >

' Compliance to VIPRE-01 SER (1986)

+ WCAP-14565 justifies limited Non-LOCA post-CHF Applications l

+ Hot rod fuel temperature (e.g. locked rotor)

+ VIPRE not used for LOCA analysis

+ DNB correlation limits verified with VIPRE

+ WCAP-14565 documents W VIPRE model

+ Courant number > 1 with subcool model

+ Code maintained under W Quality Management System (QMS)

, 1 o ** b Westinghouse Proprietary Class 3

' Compliance to VIPRE-01 MOD-02 SER (1993)

+ W VIPRE applications do not include BWR

+ Separate submittal for new DNB correlation 4 Modified WRB-2 (WCAP-15025)

+ PWR DNB and non-LOCA fuel rod l analyses conservative to code limitations

+ VIPRE modeling options qualified through benchmark with W design codes & test data 5

TopicalReport WCAP-14565

+ Previous meeting with NRC on VIPRE licensing held in 10/96

+ Submitted for review & approval in 04/97

+ Describes VIPRE modeling & qualification for PWR applications l + Similar to other NRC-approved VIPRE topical reports 6

l u

4 <s u Westinghouse Propnetary Class 3 Code & Model Qualification

+ Extensive code comparisons performed

+ With THINC for most PWR & fuel designs

+ With FACTRAN for flow reduction transients  !

+ Validation of DNB Correlation limits

+ WRB-1 data base (1108 points)

+ WRB-2 data base (684 points)

+ Qualification confirms VIPRE equivalent to W NRC-approved design codes 7

Summary

+ W VIPRE applications based on code &

methods all approved by NRC

+ Extensive qualification confirms code equivalency with NRC-approved codes

+ W VIPRE methodology already used &

licensed for international application

+ NRC is requested to complete review and approval of WCAP-14565 by Dec 1998 i